Technical Issues

To get the Mass Effect 3 Citadel DLC Technical Issues achievement / trophy you need to enter the combat arena and do the following.

Check your e-mail within the combat arena menu. It's located in the lower right of the screen when you're setting your modifiers, level, opponents, and teammates.

If you haven't received an Unusual Scores e-mail, complete the other e-mail based challenges.

Once you receive the first e-mail about Unusual Scores, you'll need to fight a super elite opponent. Simply set your combat arena to span super elite opponents of any kind. We used Geth which unlocked the next step.

Once that's completed you'll receive another e-mail that'll ask you to do a round with the handicap bonuses on. Turn them all on and then select your opponent. It's recommended that you fight a lower difficulty enemy.

Finally you'll receive an e-mail asking you to play on Spin Zone against Elite Geth with Enhanced enemy shielding on. Things will be very wrong when you enter the ring and you'll need to fight various enemy types.

Round 1

The Collectors

Round 2

The Geth

Round 3

Cerberus

Round 4

Reapers

Round 5

Collectors, Geth, Cerberus, and Reapers

Once they're all defeated you should get the Technical Issues Achievement / Trophy.